Why do we sweat more in summer?

Short Answer

Sweating plays an important health role, as it helps to maintain constant body temperature by cooling us down.
When it is hot and we sweat, that moisture evaporates and cools us immediately.
This is why we sweat more when the summer is very hot.

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Chapter 6: Human Organ systems - Evaluation [Page 84]

Chapter 6 Human Organ systems
Evaluation | Q X. 3. | Page 84

The wave of expansion of an artery when blood is forced into it is called ______.

Initiation and stimulation of heartbeat take place by nerves.

Why is the Sinoatrial node called the pacemaker of the heart?

Differentiate between systole and diastole.

Explain the conduction of heartbeat.

Doctors use the stethoscope to hear the sound of the heart. Why?

What is the pulse rate?

Match the parts of the heart in Column I with the direction of flow of blood in Column II.

Column I		Column II
(i)	Right ventricle	(a)	Pushes blood into the pulmonary artery.
(ii)	Pulmonary veins	(b)	Take deoxygenated blood from the heart to the lungs.
(iii)	Left atrium	(c)	Receives blood from different parts of the body.
(iv)	Pulmonary arteries	(d)	Bring oxygenated blood from the lungs to the heart.
(v)	Left ventricle	(e)	Pushes blood into the aorta.
(vi)	Right auricle	(f)	Receives deoxygenated blood from the pulmonary veins.

The 'Lub' and "Dub" heart sound are due to ______.

What is pulse?