Muscle cells in our heart are constantly working. which of the following organelles would they have in larger quantities than other cells in the body?
a) vacuoles
b) mitochondria
c) chloroplasts
d) nucleoli

The correct answer will be option B.

Explanation:

Mitochondria are the double-membrane organelles present in eukaryotic cells which helps in generation of the energy currency that is ATP of a cell.

Mitochondria provide a site for the generation of these ATP molecules, the reason they are known as the kitchen of the cell.  Their number in a cell depends on the function of the cell as if a cell is involved in function which need more ATP will have more mitochondria and if not will have few mitochondria.

Since a cardiac muscle cell needs more energy to pump blood from one chamber to another and to body, therefore, cells will have more mitochondria and thus, option B is the correct answer.

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.