Question

Heart of both vertebrates and invertebrates is present on the dorsal side.
A. True
B. False

Answer 1

Heart is a muscular organ which is responsible for transport of blood throughout the body. It is present on the right side of the body.

Complete Answer:
Before we find the correct answer, let us understand a little more about the difference between vertebrates and invertebrates.
The animal kingdom has been classified into two important groups: Vertebrates (Chordates) and Invertebrates (Non-Chordates). Invertebrates are those that do not hold a backbone or vertebral column while Vertebrates are those where backbone or vertebral column is present.

Option A: The heart of both, vertebrates and invertebrates is not present on the dorsal side. Therefore, this is an incorrect option.

Option B: In invertebrates (non-chordates), the heart is located on the dorsal side of the body but in vertebrates (chordates) heart is located on the ventral side of the human body. Therefore, this is the correct answer.

Thus option B is the correct answer.

Additional Information: Vertebrates (chordates) are mammals that have a backbone within their body. It comprises reptiles, fish, amphibians, animals and birds. Invertebrates (non-chordates) don't have a backbone. Invertebrates are cold-blooded and vertebrates are hot or cold-blooded.

Note: In invertebrates, there are three fundamental arrangements of internal flow observed in non-chordates: a revolution in a gastrovascular pit, closed circulatory pathway, and open circulatory pathway.
In vertebrate mammals, the heart is a deep muscular part that operates to pump the blood throughout the circulatory pathway. It can hold up to four chambers (as is the fact in animals and birds, including humans).