Explanation

Blood cells are made in the bone marrow.

The bone marrow is the soft, spongy material in the center of the bones.

It produces about 95% of the body's blood cells.

Explanation

The cerebrum is the largest part of the brain.

It is responsible for higher brain functions, including reasoning, thinking, emotions, and learning.

Explanation

The human cell contains 46 chromosomes.

These are organized into 23 pairs, where each parent contributes one chromosome to each pair, resulting in a total of 46 chromosomes in most human cells.

This number includes 22 pairs of autosomes and 1 pair of sex chromosomes, determining an individual's sex (XX for females and XY for males).

Explanation

• The average internal temperature of the human body is 37°C (98.6°F).
• It is the normal body temperature range for a healthy adult.

Explanation

 Motor nerves carry signals from the brain and spinal cord to muscles, causing them to contract and produce movement.

- Sensory nerves do the opposite — they carry information from the body to the brain (like touch, pain, temperature).

- Mixed nerves contain both sensory and motor fibers and serve both functions.

- Cranial nerves can be sensory, motor, or mixed, but not all of them control muscle movement.

Explanation

The brain is divided into two hemispheres: the right and left cerebrum.

- Left Cerebrum is dominant for:

  - Logical reasoning  

  - Language  

  - Analytical thinking  

  - Mathematical calculations  

  - Reading and writing  

- Right Cerebrum is dominant for:

  - Creativity  

  - Artistic skills  

  - Intuition  

  - Spatial ability  

  - Recognizing faces and patterns  

- Mnemonic:  

  - Left = Logic, Right = Creativity

Explanation

When a person stands near a fire, they feel hot primarily through radiation and convection. 

Radiation

• This is the transfer of heat through electromagnetic waves, primarily infrared radiation, and does not require a medium (like air or water) to travel.
• Fire radiates energy in all directions, which is why you can feel the warmth even if the air around you is cold.
• When the radiant energy from the fire hits your skin, it is absorbed and converted into thermal energy, making you feel warm. 

Convection

• This is the transfer of heat through the movement of a heated fluid (in this case, air).
• The air directly above the fire gets hot, becomes less dense, and rises.
• This creates air currents that carry heat upward and can warm a person standing nearby.
• However, when standing to the side of a fire, the effect of convection is usually much less than radiation, as the hottest air rises and billows away from you. 

Explanation

Explanation

The tip of the tongue is primarily concentrated with taste buds sensitive to sweet flavors. 

Bitter: Bitter taste is more concentrated at the back of the tongue. 

Sour: Sour taste is detected on the sides of the tongue. 

Salty: Salty taste is detected primarily on the front and sides of the tongue. 

Explanation

Glands with both endocrine and exocrine functions are known as dual glands or mixed glands

Liver → Considered a double gland (exocrine: bile secretion, endocrine: plasma proteins, etc.).

Pancreas →  Classical double gland (exocrine: digestive enzymes, endocrine: insulin, glucagon).