Question

In-text Questions
1. Define skeleton.
2. How many bones are present in vertebral
column of human beings?
3. State the function of rib cage in human body.
4. Which part is giving protection to brain?
5. What is a cartilage?
Are muscles and bones always required​

Answer 1

Answer:

. Define skeleton.

• The skeleton is the body part that provides support, shape and protection to the soft tissues and delicate organs of animals

How many bones are present in vertebral

column of human beings?

• Vertebral column in general. The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).

State the function of rib cage in human body.

• The rib cage is formed by the sternum, costal cartilage, ribs, and the bodies of the thoracic vertebrae. The rib cage protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities.

Which part is giving protection to brain?

• The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cushioned and protected by cerebrospinal fluid. This watery fluid is produced by special cells in the four hollow spaces in the brain, called ventricles.

What is a cartilage?

• Cartilage is a tough but flexible tissue that is the main type of connective tissue in the body. Around 65–80% of cartilage is water, although that decreases in older people, and the rest is a gel-like substance called the 'matrix' that gives it its form and function.

Answer 2

1. A skeleton is the hard structure that protects the internal organs of a living thing. Skeletons can be inside the body or outside the body. In mammals, which include humans, the skeleton is made of bones. All the bones, when they are joined together, make the "skeletal system" of a body.
2. The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).
3. The rib cage protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities.
4. The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cushioned and protected by cerebrospinal fluid. This watery fluid is produced by special cells in the four hollow spaces in the brain, called ventricles
5. Cartilage is an important structural component of the body. It is a firm tissue but is softer and much more flexible than bone.