Explanation

ATP (Adenosine Triphosphate) is called the energy currency of the cell because it stores and provides energy for cellular activities.

It releases energy when converted to ADP (Adenosine Diphosphate), which is then recycled back into ATP through cellular respiration.

Explanation

• Aerobic respiration uses oxygen to release energy from food.
• It produces ATP, carbon dioxide and water.

Last verified on 08-11-2026

Explanation

• Mitochondria produce most of the ATP used by the cell.
• They are the main sites of aerobic cellular respiration.

Last verified on 08-11-2026

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

• The heart is mainly composed of specialized cardiac muscle tissue.
• Cardiac muscles contract and relax rhythmically to pump blood throughout the body.

Last verified on 08-11-2026