Question

what is hepatic portal system in cephalochordata ? no spam

Answer 1

Explanation:

Hepatic portal system is responsible for directly carrying blood from the digestive system to the liver. It is present in higher chordates.

Answer 2

Cephalocordata:

• It is the sub phylum of protocordata which are the earliest and less developed chrodates.
• They are said to be the ancestors of most of the chordates/Vertebrates present today.

Their Hepatic portal system:

• Hepatic portal system is the system in which blood returns from digestive system to blood. This is done by blood
• Cephalochordates have closed circulatory system.
• They lack a central pumping organ "heart$\large{ \sf{ \red{ \heartsuit}}}$".
• The blood flows due to pulsation, which is the rhythmic contraction and relaxation.
• The blood have no pigments, they mostly transport nutrients in the body.

Other Characteristics:

• The notochord is present in adult, little less developed in young ones.
• A tubular nerve chord is present dorsally.
• Metamerism is distinct.
• A distinct coelom is present.
• Protonephridia with soelnocytes are present for excretion.

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