Define the following(i) Diaphragm (ii) spiracles
Answers
Answer:
i) a dome-shaped muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs is called diaphragm.
ii)spiracles is an external respiratory opening, especially each of a number of pores on the body of an insect, or each of a pair of vestigial gill slits behind the eye of a cartilaginous fish.
Question ⤵
Define the following
- (i) Diaphragm
- (ii) spiracles
Answer ⤵
(i) The diaphragm is a thin skeletal muscle that sits at the base of the chest and separates the abdomen from the chest. It contracts and flattens when you inhale. This creates a vacuum effect that pulls air into the lungs. When you exhale, the diaphragm relaxes and the air is pushed out of lungs.
(ii) Spiracles are openings or tiny pores on the surface of some animals, which usually lead to respiratory systems. In cockroach, respiration occurs through spiracles – a small opening on the sides of its body. ... The respiratory organ of cockroach is referred to as tracheae.