In this article we will discuss about:- 1. Meaning of Gastrulation 2. Basic Mechanism in Gastrulation 3. Methods 4. Morphogenetic Movement 5. Different Chordates 6. Analysis of Mechanism. Contents: Meaning of Gastrulation Basic Mechanism in Gastrulation Methods used to Study Gastrulation Morphogenetic Movement of Cells in Gastrulation Gastrulation in Different Chordates Analysis of Gastrulation Mechanism 1. Meaning of Gastrulation: The [...]
In this article we will discuss about:- 1. Meaning of Placenta 2. Types of Placenta 3. Organogenesis 4. Functions. Meaning of Placenta: The embryo, specially in eutherian mammals, becomes implanted to the uterine wall. The process of implantation involves tissue interaction and establishment of connection between the uterine wall and the extraembryonic membranes. The region of attachment between the embryonic [...]
In this article we will discuss about:- 1. Movements of Body Parts in Living Organism 2. Types of Movement in Living Organism. Movements of Body Parts in Living Organism: All the animals are able to move their body parts. (a) Movements of External Body Parts: These serve many purposes: (i) Movements of limbs, appendages, head and trunk help to maintain [...]