Embryonic Development Terminology Notes

This refers to a layer of cells that forms the outermost covering of the developing embryonic epithelium in the early stages of embryonic development.
Function: The periderm plays a crucial role in protecting underlying tissues during development and assists in the formation of later skin layers.

This is a waterproof protective covering produced by the sebaceous glands, primarily composed of sebum (an oily substance) and sloughed-off skin cells.
Function: Vernix caseosa serves to protect the skin of the developing fetus from amniotic fluid, preventing maceration and facilitating smoother passage during birth. It also has antimicrobial properties.

Defined as a layer of embryonic cells that gives rise to the dermis, among other connective tissues in the body.
Characteristics: Mesenchyme cells are loose and have the ability to differentiate into various cell types, including fibroblasts, which contribute to the structural framework of organs and tissues.
Importance: It plays a pivotal role in organ development and the formation of blood vessels, contributing to the overall structural integrity of developed tissues and organs.