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.

Verified step by step guidance

1. Step 1: Understand the question. The question is asking when all the rudiments, or initial stages, of all organs develop during human gestation.
2. Step 2: Recall what happens during each stage of human gestation. The first trimester is when the embryo develops into a fetus, the second trimester is when the fetus grows and develops, and the third trimester is when the fetus continues to grow and prepare for birth. The blastocyst stage is a very early stage of development, just after fertilization.
3. Step 3: Consider the development of organs. Organs begin to form in the first trimester, but they continue to develop throughout the second and third trimesters. However, the rudiments, or initial stages, of all organs are formed in the first trimester.
4. Step 4: Compare this information to the answer choices. The answer choice that matches our understanding is 'in the first trimester.'
5. Step 5: Choose the correct answer. The rudiments of all organs develop in the first trimester.

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.