Embryology

2.

2.1.

Overview of Gametogenesis

2.1.1.

Purpose and Significance

2.1.2.

Comparison of Male and Female Gametogenesis

2.2.

Spermatogenesis

2.2.1.

Location in Seminiferous Tubules

2.2.2.

Process Overview

2.2.2.1.

2.2.2.1.1.

Type A Spermatogonia

2.2.2.1.2.

Type B Spermatogonia

2.2.2.1.3.

Mitotic Divisions

2.2.2.2.

Primary Spermatocytes

2.2.2.2.1.

Entry into Meiosis I

2.2.2.3.

Secondary Spermatocytes

2.2.2.3.1.

Completion of Meiosis I

2.2.2.3.2.

Entry into Meiosis II

2.2.2.4.

2.2.2.4.1.

Completion of Meiosis II

2.2.3.

2.2.3.1.

Nuclear Condensation

2.2.3.2.

Acrosome Formation

2.2.3.3.

Flagellum Development

2.2.3.4.

Cytoplasm Reduction

2.2.4.

Structure of Mature Spermatozoon

2.2.4.1.

2.2.4.1.1.

2.2.4.1.2.

2.2.4.2.

2.2.4.3.

2.2.4.3.1.

Mitochondrial Arrangement

2.2.4.4.

2.2.4.4.1.

Axoneme Structure

2.2.5.

Hormonal Regulation of Spermatogenesis

2.2.5.1.

2.2.5.2.

2.2.5.3.

2.2.5.4.

2.3.

2.3.1.

Location in Ovaries

2.3.2.

Process Overview

2.3.2.1.

2.3.2.1.1.

Mitotic Proliferation

2.3.2.2.

Primary Oocytes

2.3.2.2.1.

Arrest in Prophase I

2.3.2.2.2.

Follicular Development

2.3.2.3.

Secondary Oocytes

2.3.2.3.1.

Completion of Meiosis I

2.3.2.3.2.

Arrest in Metaphase II

2.3.2.4.

2.3.2.4.1.

2.3.2.4.2.

2.3.3.

Ovarian Follicle Development

2.3.3.1.

Primordial Follicle

2.3.3.2.

Primary Follicle

2.3.3.3.

Secondary Follicle

2.3.3.4.

Graafian Follicle

2.3.3.5.

Atresia of Follicles

2.3.4.

2.3.4.1.

Hormonal Triggers

2.3.4.2.

Release of Secondary Oocyte

2.3.5.

Corpus Luteum Formation and Function

2.4.

Comparison of Spermatogenesis and Oogenesis

2.4.1.

Timing and Duration

2.4.2.

Number of Gametes Produced

2.4.3.

Cytoplasmic Division

2.4.4.

Meiotic Arrests

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1. Introduction to Developmental Biology and Embryology

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3. First Week of Development