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2 years ago

A. create a data table to compare and contrast the physical features of the three skeletons.

Biology

1 answer:

Natalija [7]2 years ago

7 0

Comparing the physical features of the three types of skeletons

<u>Endoskeleton :</u>

Less Flexible than cartilage

<u>Exoskeleton :</u>

very rigid and hard

<u>Hydrostatic skeletons </u> :

Less rigid and very flexible

<h3>Physical difference of the types of skeletons </h3>

The endoskeleton is the internal skeleton present in vertebrates in the form of bones which enables the movement of animals while supporting the organs of the body to remain in position. they are less flexible when compared to cartilage. Exoskeletons are outer skeletons which protect organisms and also enables them to move freely. They are very rigid and hard.

Hence we can conclude that the comparison between the types of skeletons are as listed above.

Learn more about the types of skeletons : brainly.com/question/8196488

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Helga [31]

Answer:

Option B, ventricular diastole

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Ventricular diastole also termed as ventricular relaxation consists of two phases. In the first phase, the following set of events takes place –

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c) As this reduced blood pressure gets lower than that of pressure with in the pulmonary trunk and aorta, blood starts flowing back towards the heart.

d) A small dip in the blood pressure is observed at this stage

e) Volume at this stage remains constant as the atrioventricular valves remain closed

f) This phase is known as isovolumic ventricular relaxation phase

In the second phase, the following set of events takes place –

a) Relaxation of ventricular muscle

b) Dropping of pressure of the blood within the ventricles lower than that of pressure of blood in the atria

c) Blood starts flowing from atria into the ventricles thereby opening the tricuspid and mitral valves

d) Both the heart chambers chambers are in diastole,

e) Atrioventricular valves are open

f) Semilunar valves remain closed

Hence, option B is correct

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