Question

Difference between neurogenic and myogenic heart

Answer 1

Answer:

Difference between Myogenic and Neurogenic heart. -

Myogenic heart :

1. Occurrence: Mollusks and vertebrates. 

2. Initiation of heart beat: Under nodal tissues, so under muscular control. 

3. Heart removed from body: Continues to beat for some time. 

Neurogenic heart : 

1. Occurrence: Crustaceans, insects and annelids. 

2. Initiation of heart beat: Under a ganglion present on the heart, so under nervous control. 

3. Heart removed from body: Stops beating.

Explanation: hope this helps U!!

Answer 2

Answer :-

Myogenic Heart :-

■ In "Myogenic Heart", the contractions are initiated by a special node of modified cardiac muscles called "Sino-Atrial node" (SA node).

■ Examples :-

• Hearts of "Vertebrates"
• Hearts of "Tunicates"
• Hearts of "Molluscs"

Neurogenic Heart :-

■ In "Neurogenic Heart", the contractions are initiated by a nerve ganglion, situated in the vicinity of the heart.

■ Examples :-

• Invertebrates like anthropods (Cockroach)
• Some annelids (Earthworm)

Extra Information :-

• Acetylcholine secreted by the nerve ending accelerates the neurogenic heartbeat.

• In neurogenic heart, the heartbeats originate by nevous stimulation.

• If the nerve supply of the hearts of vertebrates is cut off or even removed from the body, it continues to beat.