Examlex
Which of the following statements is true?
Circulatory System
The circulatory system is an organ system that permits blood and lymph circulation to transport nutrients, oxygen, carbon dioxide, hormones, and blood cells to and from cells in the body.
Mesoderm
The intermediate layer in an embryo during its initial stages of development, responsible for forming the muscular, skeletal, and circulatory systems.
Somites
Blocks of mesoderm that are located on either side of the spine in the developing embryo, which will differentiate into the vertebrae, ribs, muscles, and dermis.
Mesonephros
One of three excretory organs appearing during embryonic development; forms caudal to the pronephros as the pronephros disappears. It is well developed and is functional for a time before the establishment of the metanephros, which gives rise to the kidney. It undergoes regression as an excretory organ, but its duct system is retained in the male as the efferent ductule and epididymis.
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