Question

1. im the only part of your body that cant repair itself. i am

_________.

1. im shaped like a butterfly and control your metabolism. i am the

_________.

1. i filter 200 quarts of blood daily but only weigh about a pound. i am a

_________.
body systems 9. im a muscular tube about 10 inches long that moves
food using peristalsis. i am the _________

1. i produce insulin but im not an organ focused on digestion. i am

the _________.
11 im red when oxygenated, blue when not, and i travel in vessels. i
am _________.

1. im the smallest blood vessel but the most important for gas

exchange i am a _________.

1. we come in pairs, exchange gases, and contain about 300 million

air sacs. we are _________.

Explanation:

Question 6:

The only body part that can't repair itself is the tooth enamel (or teeth, but more precisely enamel; however, in basic biology for such questions, often "tooth" or "enamel" but sometimes the answer expected is "tooth" or "enamel". Wait, actually, the lens of the eye also can't repair, but more commonly in school biology, the answer for "can't repair itself" is often the tooth (enamel). But maybe the answer here is "tooth" or "enamel". Wait, maybe the intended answer is "tooth" (enamel). Alternatively, some sources say the cornea, but in basic biology, maybe tooth. Let's check standard answers: The tooth (enamel) is often cited as a body part that can't repair. So the answer is tooth (or enamel).

Question 7:

The butterfly - shaped gland that controls metabolism is the thyroid gland. The thyroid gland is located in the neck, has a butterfly - like shape, and secretes hormones that regulate metabolism.

Question 8:

The organ that filters 200 quarts of blood daily and weighs about a pound is the kidney. Each kidney filters blood, and together they filter a large amount of blood daily.

Question 9:

The muscular tube about 10 inches long that moves food using peristalsis is the esophagus. The esophagus is a muscular tube that connects the pharynx to the stomach and uses peristaltic contractions to move food.

Question 10:

The structure that produces insulin and is not mainly a digestive organ is the pancreas (the islets of Langerhans in the pancreas produce insulin). While the pancreas has digestive functions, the production of insulin is a key endocrine function, and it's not primarily a digestive organ in terms of its main function related to insulin production.

Question 11:

The substance that is red when oxygenated and blue when not, and travels in vessels is blood (specifically red blood cells with hemoglobin). Hemoglobin in red blood cells binds to oxygen, making the blood red when oxygenated and blue - red (or dark red) when deoxygenated, and blood travels in blood vessels.

Question 12:

The smallest blood vessel important for gas exchange is the capillary. Capillaries have thin walls (one cell thick) that allow for the exchange of gases, nutrients, and waste between the blood and the body's cells.

Question 13:

The paired organs that exchange gases and contain about 300 million air sacs (alveoli) are the lungs. The lungs are a pair of organs in the respiratory system, and the alveoli are the sites of gas exchange, with millions of alveoli in each lung.

Answer:

1. tooth (or enamel)
2. thyroid gland
3. kidney
4. esophagus
5. pancreas
6. blood (red blood cells)
7. capillary
8. lungs