The heart has an intrinsic conduction system that causes electrical activity in the heart muscles causing them to contract. The intrinsic conduction system is made up specialized cells, that contain nerve and muscular characteristics.
The muscle cells in the heart are linked together by gap junctions, allowing cardiac action potentials to travel from one muscle cell to another.
Atrioventricular (AV) node. The damage to the AV node causes the electrical signals traveling from the upper chambers to the lower chambers to be impaired causing an AV block.

Explanation:

7 0

3 years ago

Which type of inheritance is described here?

Semmy [17]

Answer:Mice can be male without Y chromosome ... Ward’s work is “a lovely example of how you can lose even a really important gene,” she says. ... don’t have Eif2s3y genes on their Y chromosomes.

Explanation:

8 0

2 years ago

Name three organelles or structures found in plant cells but NOT in animal cells. Group of answer choices nucleus chloroplast mi

BARSIC [14]

Answer:

Cell wall, chloroplast, and central vacuole

Explanation:

Cell wall, chloroplast, and central vacuole are present in a plant cell but not in the animal cell.

Nucleus, cell membrane, and cytoplasm present in both plant and animal cells.

6 0

2 years ago