Answer:

1)Brain—The brain itself deforms just from the weight of itself pressing onto her hand. "It's very very soft. ... One of the purposes of the fluid that surrounds the brain in our skulls is to float it so it doesn't knock against the bones of our skull and get damaged, as it does in a concussion.

2)Large and small intestine—

Because there are so many villi, they greatly increase the surface area for absorption. In fact, they make the inner surface of the small intestine as large as a tennis court! This image shows intestinal villi greatly magnified.

3)Heart—The heart is important because it pumps blood around your body, delivering oxygen and nutrients to your cells and removing waste products. The heart has four chambers: two upper chambers called the right and left atria (singular: atrium) and two lower chambers called the right and left ventricles.

4)Lungs—The diaphanous alveolar walls contain the capillaries with their extremely thin blood–gas barriers, and the same structure is responsible for the volume changes that move air into the lung. It is this combination of functions that makes the mammalian lung so vulnerable

5)Spinal cord—Gracefully slender and utterly fragile, the spinal cord is one of the most sensitive parts of the body, to the extent that minor damage can lead to paralysis. Medical experts warn that damage to any part of the spinal cord can lead to permanent changes in sensation, one's strength and other bodily functions.

Answer:

Barin >

The brain is extremely sensitive and delicate, and so it requires maximum protection, which is provided by the hard bone of the skull and three tough membranes called meninges.

Large and small intestine >

The small intestine is where digestion is completed and virtually all absorption occurs. These two activities are facilitated by structural adaptations that increase the mucosal surface area by 600-fold, including circular folds, villi, and microvilli.

>Its job is to absorb most of the nutrients from what we eat and drink. Velvety tissue lines the small intestine, which is divided into the duodenum, jejunum, and ileum. The large intestine (colon or large bowel) is about 5 feet long and about 3 inches in diameter. The colon absorbs water from wastes, creating stool.

Heart and Lungs >

The heart and lungs work together to make sure the body has the oxygen-rich blood it needs to function properly. The Pulmonary Loop The right side of the heart picks up the oxygen-poor blood from the body and moves it to the lungs for cleaning and re-oxygenating.

Spinal cord >

A column of nerve tissue that runs from the base of the skull down the center of the back. ... The spinal cord and membranes are surrounded by the vertebrae (back bones). The spinal cord and the brain make up the central nervous system (CNS). Spinal cord nerves carry messages between the brain and the rest of the body.

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