Question

2. Which of the following organs is not responsible for excretion in human body? (a) Kidney (b) Heart (c) Lungs (d) Skin​

Answer 1

Answer : Heart

Kidney excretes metabolic wastes
Skin excretes sweat , sebum , etc
Lungs excrete CO2

Answer 2

• Most animals have a muscular heart that pumps blood through the circulatory system's blood vessels.
• The pumped blood transports oxygen and nutrients to the body while also transporting metabolic waste like carbon dioxide to the lungs.
• The heart in humans is about the size of a closed fist and is found in the middle compartment of the chest, between the lungs.

• The heart is divided into four chambers in humans, other mammals, and birds: the upper left and right atria, as well as the lower left and right ventricles.
• The right atrium and ventricle are commonly referred to as the right heart, whereas the left atrium and ventricle are referred to separately as the left heart.
• Reptiles have three chambers, whereas fish have two chambers, an atrium and a ventricle.
• Due to the presence of heart valves that prevent backflow, blood flows one way through a healthy heart.