Its not that we allow it it just happens and noone can say anything about it even though its wrong
An isometric contraction is the kind of contraction that leads to development of tension but no increase in length.
An isometric contraction occurs as the muscle produces tension without changing the angle of a skeletal joint. Isometric contraction is a static muscle action that helps to maintain the posture. For example, the antigravity muscles. It occurs in the biceps when the arms may be holding a weight. In such a posture, the biceps enlarge due to holding of weight and produces tension but do no increase in length. It stops the flexion of elbow. In such contraction, no work is done, and lesser amount of heat energy is released in comparison to isotonic contractions.
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Answer:
Sharks swallowed and ate the bodies of African slaves that were thrown into the sea.
Explanation:
The middle passage is a stage in the triangular trade where Slaves from the African coasts were carried across the Atlantic ocean to South and North America. In the course of crossing this ocean, some slaves became so weak that they could no longer continue the journey. Some others died from the stress and starvation they experienced in the course of the journey. This set of people were usually thrown into the ocean by their captors and their bodies were readily swallowed by the sharks.
It is believed that some of these sharks followed the ships closely so as to readily grab the opportunity of swallowing the slaves when they were thrown aboard.
