NEET BIOLOGY

Detailed explanation-1: -In the human heart, oxygenated blood flows through the right side and carbon dioxide-rich blood flows through the left side.

Detailed explanation-2: -(Figure). Blood flows from the right atrium to the right ventricle where it is pumped into the pulmonary circuit. The blood in the pulmonary artery branches is low in oxygen but relatively high in carbon dioxide.

Detailed explanation-3: -The right side of the heart pumps oxygen-poor blood from the body to the lungs, where it receives oxygen. The left side of the heart pumps oxygen-rich blood from the lungs to the body. Once the body’s organs and tissues have removed the oxygen from the blood, the blood returns to the heart. The cycle is then repeated.

Detailed explanation-4: -Carbon dioxide excess causes an increase in ventilation volume by virtue of a greater depth of breathing, the frequency decreasing slightly. The heart rate goes up with increasing carbon dioxide concentrations.