During human gestation, rudiments of all organs develop a. in the first trimester. b. in the second trimester. c. in the third trimester. d. during the blastocyst stage.

Key Concepts

Human Gestation Stages

Human gestation is divided into three trimesters, each characterized by specific developmental milestones. The first trimester is crucial for the formation of major organs and systems, while the second and third trimesters focus on growth and maturation of these structures.

Organogenesis

Organogenesis is the process during which the rudiments of all major organs develop from the embryonic layers. This process primarily occurs in the first trimester, where the foundations for the heart, brain, and other vital organs are established.

Blastocyst Stage

The blastocyst stage occurs shortly after fertilization and involves the formation of a hollow sphere of cells. While this stage is critical for implantation and early development, the actual development of organ systems begins later during the first trimester.