Question

Q. 168. Heart is
1) Derived from endoderm in human
2) Protected by a double walled pericardium
3) 4 chambered in all vertebrates
4) Myogenic throughout animal kingdom ​

Answer 1

Answer:

Explanation:

The heart is enclosed by a sac-like covering called as pericardium. It has 2 layers. The outer layer is more fibrous and is called as a parietal layer.

Answer 2

$\bold{Answer\;:2}$

• Heart in mammals is four-chambered and is enclosed in pericardium (double-walled). The human heart is mesodermal in origin. Mammalian heart is myogenic in nature.

$\bold{Hope\;it \; helps\;!}$