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Chapter 43: Q. 26 (page 1260)

Major organs begin to develop during which part of human gestation?

a. fertilization b. first trimester c. second trimester d. third trimester

Short Answer

Expert verified

The correct option is d. third trimester .

Step by step solution

01

Step 1. Given ifnormation

The gestation period is divided into three equal periods or trimesters. During the first two to four weeks of the first trimester, nutrition and waste are handled by the endometrial lining through diffusion

02

Step 2. Explanation

The correct option is d. third trimester .

The gestation period is divided into three equal periods or trimesters.

As the trimester progresses, the outer layer of the embryo begins to merge with the endometrium, and the placenta forms.

Internal organs and body structures begin to develop during the first trimester. By five weeks, limb buds, eyes, the heart, and liver have been basically formed. By eight weeks, the term fetus applies, and the body is essentially formed.

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Most popular questions from this chapter

Which hormone causes the regrowth of the endometrial lining of the uterus?

a. testosterone b. estrogen c. GnRH d. progesterone

Nutrient and waste requirements for the developing fetus are handled during the first few weeks by: a. the placenta b. diffusion through the endometrium c. the chorion d. the blastocyst

What are the advantages and disadvantages of external and internal forms of fertilization?

Which female organ has an endometrial lining that will support a developing baby?

a. labia minora b. breast c. ovaries d. uterus

Explain the role of axis formation in development.
See all solutions

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