How can muscles have oxygen?when they lack oxygen which produces lactic acid in our muscles and cause cramps?

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Solution

Dear Student,

Muscle Cells get oxygen from circulating blood flow. Oxygen is transported from lungs to all the cells of the body.
During vigorous exercise, deficiency of oxygen occurs and in deficiency of oxygen muscle cells perform anaerobic respiration.
Lactate dehydrogenase (LDH or LD) is an enzyme found in nearly all living cells (animals, plants, and prokaryotes). LDH catalyses the reversible conversion of pyruvate to lactic acid, as it converts NAD+ to NADH and back. A dehydrogenase is an enzyme that transfers a hydride from one molecule to another.
Production of Lactic acid by this anaerobic pathway causes cramps in muscles.

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