Question

LEAD SCHOOL
Class 5
- EVS - Unit 1 - ASM 2
3.
Write True or False:
(4 marks)
a.
We have 10 pairs of bones in the ribcage-
Voluntary muscles can tire easily because they can contract and expand easily-
b.
C.
The pectoral girdle connects hind limbs to the central structure of the ribcage and
back bone -
The brain, spinal cord and nerves make the nervous system-
d.
4.
Label the three parts of the brain. Write the role of each part.
(3 marks)​

Answer 1

Answer:

Explanation:

The thoracic cage (rib cage) forms the thorax (chest) portion of the body. It consists of the 12 pairs of ribs with their costal cartilages and the sternum (Figure 1). The ribs are anchored posteriorly to the 12 thoracic vertebrae (T1–T12). The thoracic cage protects the heart and lungs.

This figure shows the skeletal structure of the rib cage. The left panel shows the anterior view of the sternum and the right panel shows the anterior panel of the sternum including the entire rib cage.

Figure 1. Thoracic Cage. The thoracic cage is formed by the (a) sternum and (b) 12 pairs of ribs with their costal cartilages. The ribs are anchored posteriorly to the 12 thoracic vertebrae. The sternum consists of the manubrium, body, and xiphoid process. The ribs are

Answer 2

Explanation:

- EVS - Unit 1 - ASM 2

3.

Write True or False:

(4 marks)

a.

We have 10 pairs of bones in the ribcage-

Voluntary muscles can tire easily because they can contract and expand easily-

b.

C.

The pectoral girdle connects hind limbs to the central structure of the ribcage and

back bone -

The brain, spinal cord and nerves make the nervous system-

d.

4.

Label the three parts of the brain. Write the role of each part.

(3 marks)