Body Parts That Start With The Letter B

81 Body Parts That Start With The Letter B

Have you ever thought about how many body parts you can name that start with the letter B? It might not be as easy as you think. From the head to the toes, the human body is a complex and fascinating machine, and each part plays a critical role in our overall health and well-being.

In this article, I will explore some of the most essential body parts that start with the letter B and learn more about their functions. Whether you are a medical student, a fitness enthusiast, or just curious about the human body, this article is for you.

So, without further ado, let’s dive in and explore the fascinating world of body parts that start with the letter B!


Body Parts That Start With The Letter B

Below are some body parts starting with the letter B:

1. Bacino

The Bacino, also known as the pelvis, is a bony structure that connects the lower limbs with the spine. It provides support for the organs in the lower abdomen and houses the reproductive organs. The pelvis also plays a crucial role in maintaining the body’s balance and posture.

2. BackBone

The backbone, or spine, is a long, flexible column of bones that supports the upper body’s weight and protects the spinal cord. It is made up of 33 individual vertebrae and is responsible for allowing us to stand upright, bend, and twist our torso.

3. Back Muscles

The back muscles are a group of muscles that run along the spine and are responsible for maintaining proper posture and movement. They are divided into three regions: the upper back, middle back, and lower back. Strong back muscles are essential for preventing back pain and improving overall fitness.

4. Ball Joint

The ball joint is a type of joint that allows for smooth movement in multiple directions. It consists of a ball and socket that are connected by ligaments and tendons. Ball joints are found in various parts of the body, such as the hip, shoulder, and knee, and are essential for proper movement and stability.

5. Ball Of Foot

The ball of the foot is the padded area located between the toes and the arch of the foot. It helps distribute the body’s weight and provides shock absorption during walking, running, or jumping.

6. Ball Sack

The ball sack, also known as the scrotum, is a pouch of skin that contains the testicles. It helps regulate the temperature of the testicles and protect them from damage.

7. Basal Ganglia

The basal ganglia are a group of structures located deep within the brain. They are responsible for controlling movement, posture, and muscle tone. The basal ganglia also play a role in cognitive functions, such as learning and memory.

8. Base Of Skull

The base of the skull is the part of the skull that supports the brain and connects to the spine. It is made up of several bones, including the occipital bone, sphenoid bone, and temporal bones.

9. Basilar Artery

The basilar artery is a blood vessel that supplies oxygenated blood to the brainstem and cerebellum. It is located at the base of the brain and is formed by the fusion of two vertebral arteries.

10. Basilic Artery

The basilic artery is a blood vessel located in the upper arm. It is a branch of the brachial artery and supplies blood to the forearm and hand.

11. Basilic Vein

The basilic vein is a large vein located in the arm. It runs along the inner aspect of the upper arm and joins the brachial vein to form the axillary vein.

12. Bauch

Bauch is a German word that refers to the abdomen or belly. It is a crucial area of the body that houses vital organs such as the stomach, liver, and intestines.

13. Bauhin’s Glands

Bauhin’s glands, also known as intestinal glands, are located in the small intestine. They secrete mucus and digestive enzymes that help break down food.

14. Bazo

Bazo is a Spanish word that refers to the spleen. The spleen is an organ located in the upper left side of the abdomen and is responsible for filtering blood and producing red blood cells.

15. Beard

The beard is a collection of hair that grows on the lower face of men. It is a secondary sexual characteristic that develops during puberty and is a symbol of masculinity.

16. Beauty Bone

The beauty bone, also known as the zygomatic bone, is a facial bone that forms the cheekbone. It helps give shape to the face and provides attachment for muscles that control facial expression.

17. Been

Been is a colloquial term that refers to the leg. It is an essential part of the body that provides support and allows for movement.

18. Beer Belly

The beer belly is a slang term that refers to excess fat that accumulates in the abdomen due to overconsumption of alcohol or a high-calorie diet. It is a common problem among men and can lead to health issues such as diabetes, heart disease, and liver problems.

19. Beine

Beine is a German word that refers to the legs. The legs are essential for walking, running, and other physical activities. They contain various muscles, bones, and nerves that work together to support the body and facilitate movement.

20. Belly

The belly, also known as the abdomen, is the area between the chest and the pelvis. It houses vital organs such as the stomach, liver, and intestines and plays a crucial role in digestion, metabolism, and elimination.

21. Belly Button

The belly button, also known as the navel, is a scar left behind after the umbilical cord is cut at birth. It is a unique feature of the human body and has no essential function.

22. Biceps

The biceps are a muscle group located in the upper arm. They are responsible for flexing the elbow and rotating the forearm.

23. Biceps Femoris

The biceps femoris is a muscle located in the back of the thigh. It is one of the three muscles that make up the hamstring group and is responsible for extending the hip and flexing the knee.

24. Bicuspid

The bicuspid, also known as the premolar, is a tooth located between the canine and molar teeth. It is used for chewing and grinding food.

25. Big Booty

The big booty, also known as the gluteus maximus muscle, is the largest muscle in the body. It is located in the buttocks and is responsible for hip extension and external rotation.

26. Bile

Bile is a fluid produced by the liver that helps break down fats in the small intestine. It is stored in the gallbladder and released into the small intestine when needed.

27. Bile Duct

The bile duct is a tube that connects the liver and gallbladder to the small intestine. It transports bile from the liver and gallbladder to the small intestine for digestion.

28. Bile Juice

Bile juice is another term for bile, a fluid produced by the liver that helps break down fats in the small intestine. It is essential for proper digestion and absorption of nutrients.

29. Biliary Tract

The biliary tract is a network of tubes that includes the liver, gallbladder, and bile ducts. It is responsible for the production, storage, and transport of bile.

30. Bladder

The bladder is a hollow organ located in the pelvis that stores urine. It is part of the urinary system and plays a crucial role in eliminating waste from the body.

31. Blaze

Blaze is a colloquial term that refers to a visible mark on the skin, such as a scar or birthmark.

32. Blood

Blood is a vital fluid that circulates throughout the body and transports oxygen, nutrients, and hormones to various organs and tissues. It is also responsible for removing waste products and fighting infections.

33. Blood cells

Blood cells are the cellular components of blood, including red blood cells, white blood cells, and platelets. They have various functions such as carrying oxygen, fighting infections, and forming blood clots.

34. Blood Vessels

Blood vessels are the tubes that transport blood throughout the body. They include arteries, veins, and capillaries and are essential for delivering oxygen and nutrients to the cells and removing waste products.

35. Boca

Boca is a Spanish word that refers to the mouth. The mouth is an essential part of the digestive system and is responsible for receiving food, chewing, and starting the digestive process.

36. Bollocks

Bollocks is a slang term used to refer to the testicles. The testicles are a crucial part of the male reproductive system and are responsible for producing sperm and testosterone.

37. Bones

Bones are hard, mineralized structures that make up the skeletal system. They provide support for the body, protect internal organs, and allow for movement.

38. Bone Marrow

Bone marrow is a soft tissue found inside bones that is responsible for producing blood cells. It contains stem cells that can differentiate into various blood cells, such as red blood cells, white blood cells, and platelets.

39. Bony Labyrinth

The bony labyrinth is a part of the inner ear that is responsible for hearing and balance. It is a complex system of canals and chambers filled with fluid and sensory cells.

40. Boobs

Boobs, also known as breasts, are a secondary sexual characteristic of females. They consist of glandular tissue and fat and are responsible for producing milk during lactation.

41. Booty Hole

The booty hole, also known as the anus, is the opening at the end of the digestive tract through which feces are eliminated from the body.

42. Bosom

The bosom is a colloquial term used to refer to a woman’s breasts. It is often used in a romantic or intimate context.

43. Botha

Botha is a term used in anatomy to describe a muscle that has two heads or origins. Examples include the biceps and triceps muscles.

44. Bottom Lip

The bottom lip is the lower lip, which is located below the upper lip. It is responsible for various functions such as speaking, eating, and facial expression.

45. Bottom Of Foot

The bottom of the foot is the sole, which is the part of the foot that comes into contact with the ground during walking or running. It contains various muscles, tendons, and ligaments that support the foot and provide shock absorption.

46. Bouche

Bouche is a French word that refers to the mouth. It is an essential part of the digestive system and is responsible for receiving food, chewing, and starting the digestive process.

47. Bowels

The bowels, also known as the intestines, are part of the digestive system and are responsible for absorbing nutrients from food and eliminating waste products. They include the small intestine and large intestine.

48. Brachia

Brachia is a term used in anatomy to describe the upper arms. The brachial artery and brachial plexus are also located in this area.

49. Brachial Artery

The brachial artery is a blood vessel that supplies blood to the arm. It is located in the upper arm and can be used to measure blood pressure.

50. Brachial Plexus

The brachial plexus is a network of nerves that supplies the arm and hand. It is located in the neck and shoulder region and can be injured in traumatic events such as car accidents.

51. Brachii

The brachii muscles are a group of muscles located in the upper arm. They include the biceps and triceps muscles and are responsible for various functions such as arm flexion and extension.

52. Brachiocephalic Artery

The brachiocephalic artery is a large blood vessel that supplies blood to the head and arm. It is one of the major arteries of the body.

53. Brachium

Brachium is a term used in anatomy to describe the upper arm, specifically the area between the shoulder and elbow.

54. Bradykinin

Bradykinin is a peptide hormone that plays a role in regulating blood pressure and inflammation. It is produced in various tissues and can cause vasodilation and increased vascular permeability.

55. Brain

The brain is the body’s control center and is responsible for regulating various bodily functions such as movement, sensation, and consciousness. It is a complex organ made up of billions of neurons and glial cells.

56. Brain cells

Brain cells, also known as neurons, are the specialized cells that make up the brain and nervous system. They are responsible for transmitting information through electrical and chemical signals.

57. Brain Stem

The brainstem is the part of the brain that connects the brain to the spinal cord. It is responsible for regulating basic bodily functions such as breathing, heart rate, and blood pressure.

58. Brazos

Brazos is a Spanish word that refers to the arms. The brachial artery and brachial plexus are also located in this area.

59. Breast

The breast is a glandular organ located on the chest of females. It is responsible for producing milk during lactation and is a secondary sexual characteristic.

60. Breast Bone

The breastbone, also known as the sternum, is a flat bone located in the center of the chest. It provides attachment for the ribs and plays a crucial role in breathing.

61. Breech

Breech refers to the position of a fetus in which the buttocks or feet are facing downward instead of the head. It can complicate childbirth and may require a caesarean section.

62. Bregma

Bregma is a term used in anatomy to describe the point where the coronal and sagittal sutures of the skull meet. It is an important landmark for neurosurgery.

63. Brest

Brest is a French word that refers to the breast. It is a glandular organ located on the chest of females and is responsible for producing milk during lactation.

64. Bridge Of Nose

The bridge of the nose is the bony part of the nose located between the eyes. It provides support for the nose and helps form the nasal cavity.

65. Bronchi

Bronchi are the two main branches of the trachea that lead to the lungs. They branch off into smaller tubes called bronchioles and are responsible for delivering air to the lungs.

66. Bronchial Cavity

The bronchial cavity is the space within the bronchi and bronchioles. It is lined with ciliated cells that help remove mucus and debris from the airways.

67. Bronchial Tubes

Bronchial tubes are the tubes that connect the trachea to the lungs. They are responsible for delivering air to the lungs and removing carbon dioxide.

68. Bronchii

Bronchii are the two main branches of the trachea that lead to the lungs. They are responsible for delivering air to the lungs and removing carbon dioxide.

69. Bronchioles

Bronchioles are the smaller tubes that branch off from the bronchi. They are responsible for delivering air to the alveoli in the lungs.

70. Bronchopulmonary Glands

Bronchopulmonary glands are glands located in the bronchi and bronchioles. They secrete mucus and help keep the airways moist.

71. Bronchus

A bronchus is one of the two main branches of the trachea that lead to the lungs. It is responsible for delivering air to the lungs and removing carbon dioxide.

72. Brow Bone

The brow bone, also known as the supraorbital ridge, is the bony prominence above the eye sockets. It provides attachment for the muscles that control eye movement and facial expression.

73. Brows

Brows are the hair-covered arches above the eyes. They play a crucial role in facial expression and are also important for protecting the eyes from sweat and debris.

74. Brunner’s Glands

Brunner’s glands are glands located in the duodenum, the first part of the small intestine. They secrete bicarbonate and mucus, which help neutralize stomach acid and protect the small intestine from damage.

75. Brust

Brust is a German word that refers to the chest. It contains vital organs such as the heart and lungs and plays a crucial role in respiration and circulation.

76. Buccal Cavity

The buccal cavity, also known as the oral cavity, is the space within the mouth. It contains the tongue, teeth, and other structures involved in chewing, swallowing, and speaking.

77. Bum

Bum is a slang term used to refer to the buttocks. It is a colloquialism and is not a medical term.

78. Bursa

A bursa is a small fluid-filled sac located near a joint. It provides cushioning and reduces friction between bones, tendons, and muscles.

79. Butt

The butt, also known as the buttocks, is the fleshy part of the body located on the posterior aspect of the pelvis. It contains the gluteus maximus muscle and is responsible for hip extension and external rotation.

80. Butt Cheeks

Butt cheeks are the fleshy parts of the buttocks that are visible on the outside of the body. They are covered in skin and contain fat and muscle tissue.

81. Buttock

The buttock is the fleshy part of the body located on the posterior aspect of the pelvis. It contains the gluteus maximus muscle and is responsible for hip extension and external rotation.


In conclusion, the body contains various parts that start with the letter B, each with its own unique structure and function. From the brain to the buttocks, these body parts work together to support life and enable movement.

It is important to maintain good health and take care of these body parts to ensure proper functioning and well-being.

Do you know any other body parts that start with the letter “B” that aren’t listed here? If yes, please share your answers in the comments section below, and I will update the list as soon as possible.

Moreover, if you are interested in exploring body parts that start with other letters, be sure to check out my related blog posts. Such as:

  • Body Parts Start With Letter A
  • Body Parts Start With Letter C
  • Body Parts Start With Letter D
  • Body Parts Start With Letter E

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