Embryology

Embryology is the study of the prenatal development of gametes and subsequent development of the embryo and foetus.

Gametogenesis is the process whereby a haploid cell (n) is formed from a diploid cell (2n) through meiosis and cell differentiation. Gametogenesis in the male is known as spermatogenesis and produces spermatozoa. Gametogenesis in the female is known as oogenesis and result in the formation of ova.

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Diagram of oogenesis showing a primary oocyte progressing through maturation to a secondary oocyte and first polar body, then forming a mature ovum and polar bodies.

Gametogenesis

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Diagram and micrograph of hyaline cartilage showing chondrocytes in lacunae within a surrounding matrix.
Tissue Structure

Cartilage

by Phoebe Parker

Graph of percent hemoglobin saturation versus PO₂, showing a central oxygen dissociation curve and dotted left- and right-shifted curves with factors affecting oxygen affinity.
Regulation of Respiration

Responses of The Respiratory System to Stress

by Alice James

Illustration of the Circle of Willis and major cerebral arteries viewed from below, with labeled anterior, middle, and posterior cerebral, communicating, internal carotid, ophthalmic, basilar, and vertebral arteries.
Special Circulations

Cerebral Circulation

by Luke MacKinnon