Explanation

• Mitochondria are called the powerhouse of the cell.
• Because they produce Adenosine Triphosphate (ATP).
• ATP is the energy currency of the cell.
• ATP provides energy for different cellular activities such as movement, growth, and transport.
• Energy is produced through aerobic cellular respiration using oxygen and الغذائی molecules.
• They are found in the cytoplasm of most eukaryotic cells.
• Richard Altmann first described mitochondria in 1890.

Main Parts of a Cell:

1. Cell membrane → Outer protective layer
2. Nucleus → Controls cell activities
3. Cytoplasm → Jelly-like material between membrane and nucleus

Last verified on 09-05-2026

Explanation

• Neurons are the basic structural and functional units of the nervous system.
• They are specialized nerve cells.
• They transmit electrical and chemical signals.
• They control communication in the body.
• Brain, spinal cord, and nerves are made up of neurons.

Last verified on 08-06-2026

Explanation

• Photosynthesis produces glucose and oxygen.
• Green plants use sunlight, water, and carbon dioxide.
• This process occurs in chloroplasts using chlorophyll.
• Glucose is used as food for energy and growth.
• Oxygen is released as a byproduct into the atmosphere.

Last verified on 10-03-2026

Explanation

• Oxygen is released from hemoglobin mainly in body tissues.
• Hemoglobin carries oxygen in the blood from lungs to body.
• In tissues, oxygen is needed for cellular respiration.
• Low oxygen concentration in tissues helps release oxygen.
• This process ensures energy production in cells.

Last verified on 08-06-2026

Explanation

• Thrombocytes (Platelets) help in blood clotting.
• They stop bleeding by forming a clot at the injury site.
• They stick together when a blood vessel is damaged.
• This prevents excess blood loss.
• They are essential for wound healing.

Last verified on 07-06-2026