Count on Your Body

How many bones are there in the adult human body?

• 199

• 206

• 234

• 222

Answer explanation

The adult human body typically has 206 bones. This number can vary slightly due to anatomical variations, but 206 is the standard count recognized in human anatomy.

How many pairs of ribs does a typical adult human have?

• 30

• 9

• 12

• 22

Answer explanation

A typical adult human has 12 pairs of ribs, totaling 24 ribs. This includes 7 pairs of true ribs, 3 pairs of false ribs, and 2 pairs of floating ribs, making 12 the correct answer.

How many muscles are there in the human body (approximately)?

• Approximately 900

• Approximately 200

• Approximately 1200

• Approximately 600

Answer explanation

The human body has approximately 600 muscles. This number includes various types of muscles, such as skeletal, smooth, and cardiac, which work together to facilitate movement and bodily functions.

How many vertebrae are there in the spine?

• 33

• 40

• 15

• 21

Answer explanation

The human spine consists of 33 vertebrae, which are divided into different regions: cervical, thoracic, lumbar, sacral, and coccygeal. Therefore, the correct answer is 33.

How many bones are there in one hand?

• 27

• 78

• 5

• 200

Answer explanation

The human hand contains 27 bones, which include the phalanges, metacarpals, and carpals. This makes 27 the correct answer, as the other options significantly overestimate or underestimate the number of bones.

How many chambers are there in the human heart?

• 1

• 4

• 8

• 2

Answer explanation

The human heart has 4 chambers: two atria and two ventricles. This structure is essential for effectively pumping blood throughout the body and separating oxygenated from deoxygenated blood.

How many lobes does the brain have?

• 4

• 1

• 10

• 2

Answer explanation

The human brain has 4 main lobes: the frontal, parietal, temporal, and occipital lobes. Each lobe has distinct functions, making the correct answer 4.

How many calories does the average person burn per day at rest (basal metabolic rate)?

• 500 to 800 calories per day.

• 3000 to 3800 calories per day.

• 300 to 400 calories per day.

• Approximately 1200 to 1800 calories per day.

Answer explanation

The average person's basal metabolic rate (BMR) typically ranges from approximately 1200 to 1800 calories per day, depending on factors like age, sex, and body composition, making this the correct choice.

How many bones make up the skull?

• 16

• 39

• 44

• 22

Answer explanation

The human skull is made up of 22 bones, which include both the cranial and facial bones. This makes 22 the correct answer, as the other options do not accurately represent the total number of bones in the skull.

How many senses does the human body traditionally recognize?

• 1

• 88

• 3

• 5

Answer explanation

The human body traditionally recognizes 5 senses: sight, hearing, taste, touch, and smell. This classification has been widely accepted in both scientific and educational contexts.

Tags

NGSS.MS-LS1-8