Human Body: Organ Systems- 2 - Class 3 MCQ

The organ in the nose that helps us is the olfactory system. This system is responsible for our sense of smell. Within the nasal cavity, there are specialized cells called olfactory receptors that detect and transmit signals about different odors to the brain. The sense of smell plays a crucial role in detecting and identifying various scents in the environment, influencing our taste, and even contributing to emotional responses.

The tongue aids in various functions, including taste perception, swallowing, and speech articulation.

The reproductive system enables the process of sexual reproduction, allowing for the creation of offspring and the continuation of the species.

The stomach is located in the upper abdomen, beneath the ribcage and on the left side of the body.

Our heart has four chambers. The heart is a muscular organ that pumps blood throughout the body, and it is divided into four chambers: two atria (upper chambers) and two ventricles (lower chambers). The right atrium receives deoxygenated blood from the body and sends it to the right ventricle, which then pumps the blood to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and sends it to the left ventricle, which pumps the oxygen-rich blood to the rest of the body. The division of the heart into four chambers allows for an efficient and coordinated pumping of blood to meet the body's oxygen and nutrient requirements.

The kidneys are situated in the abdominal cavity, specifically in the retroperitoneal space, on either side of the spine.

Swallowing the food without chewing it is not a good habit. Chewing is an essential part of the digestion process as it breaks down food into smaller particles, making it easier for the digestive enzymes to work and facilitating nutrient absorption.