There are three protective layers around our brain and spinal cord, called meninges. These layers are named in the order from outside to inside

1. Temporal lobe – integrates memories with the senses of taste, sound, sight, and touch.

2. Parshivika Pali – Holds information about temperature, taste, touch and movement.

3. Frontal lobe – responsible for communicative functions and control of voluntary movement or activity.

4. Occipital lobe – responsible for vision

1. Excretion is the process in which all metabolic wastes are passed out of the body. Excretion in humans occurs in several processes through various organs and internal organs of the body.

2. Diffusion is the most common process of excretion in lower organisms. The human body is an extraordinary machine, where various life-processes (respiration, circulation, digestion, etc.) occur simultaneously. As a result, many of the waste products produced in our bodies are in various forms including carbon dioxide, water, and nitrogenous products such as urea, ammonia, and uric acid.

 1. Among these, olive cultivation is studied in olivoculture.

2. Olives originated in the region of Southern Europe near the Mediterranean Sea. Currently, the largest producing countries are in the same region, with Spain, Italy, Morocco, Turkey and Greece being the largest producers.

1. Which plane mirror is used to make periscope?

2. An optical instrument used to see through an object that is occluded from the direct line of sight is called a periscope.

3. A periscope consists of two plane mirrors placed at an angle of 45°.

4. When light falls on one of the mirrors then after reflection from the first mirror it falls on the second mirror which further reflects it and falls on the eye of the observer.

The sperm cell is the smallest cell in the human body. The volume of these cells is quite tiny. The head of a sperm cell is roughly 4 micrometres long, about the same size as a red blood cell (RBCs). Egg cells are the biggest cells in the human body (ovum).

1. Viruses do not find a place in classification because they are not actually considered 'living'.

2. Viruses are non-cellular organisms.

3. The name virus which means poison or poisonous fluid was given by Dmitry Ivanovsky.

4. Viruses cause diseases like mumps, smallpox, shingles and influenza.

1. The average life of red blood cells in the human body is 120 days. This is the time it takes from the formation of red blood cells until they flow in the blood. Red blood cells are made in the bone marrow and then they are shed into the blood. While flowing in the blood, red blood cells carry oxygen from the lungs to the rest of the body and carry carbon dioxide from the rest of the body to the lungs.