The key difference between zona pellucida and corona radiata is that zona pellucida is a non-cellular secretory glycoprotein layer that surrounds the plasma membrane of mammalian ovum while corona radiata is a follicle cell layer that surrounds zona pellucida. In fertilization, a mature ovum fuses with a sperm. Generally, fertilization takes place only between one […]

The key difference between dermatome and cutaneous innervation is that the dermatome is an area of the skin that is innervated by a single spinal nerve. Meanwhile, the cutaneous innervation is an area of the skin innervated by a specific cutaneous nerve. Skin is the largest organ that we have. It is the outermost covering […]

关键阀和括约肌的区别that valve is a flap-like structure of a hollow organ that allows one-way fluid flow through it while sphincter is a ring-like muscle which is able to contract or close a bodily passage or opening. Valve and sphincter are two structures that carry out similar functions in […]

The key difference between adrenal cortex and adrenal medulla is that adrenal cortex is the outer region of the adrenal gland that secretes steroid hormones while adrenal medulla is the centre of the adrenal gland that secretes epinephrine and norepinephrine. Adrenal gland is a small triangular organ located just above the kidney. Therefore, there are […]

The key difference between amnion and allantois is that amnion is the innermost thin membrane that surrounds the developing embryo or fetus, forming a hydrostatic cushion, while allantois is an extension of the posterior wall of the yolk sac, and lies between the amnion and chorion. A developing embryo is surrounded by several fetal membranes. […]

The key difference between basal ganglia and cerebellum is that basal ganglia are found deep within the cerebral hemispheres while cerebellum is found below the pones attached to the bottom of the brain. The brain is a complex structure. It is one of the two components of the central nervous system. There are three main […]

The key difference between omasum and abomasums is that omasum, which is the third compartment of the ruminant stomach, digests food mechanically or by fermentation, while abomasum, which is the fourth compartment of the ruminant stomach, digests food chemically. Ruminants are animals such as cow, sheep, goats, etc., that have a polygastric digestive system. Their stomach has […]

The key difference between merocrine and apocrine sweat glands is that merocrine sweat glands excrete sweat directly onto the surface of the skin opening out through the sweat pore while apocrine sweat glands secrete sweat into the pilary canal of the hair follicle without opening directly onto the surface of the skin. Glands are a […]

The key difference between pseudo ruminant and ruminant systems is that pseudo ruminant digestive system has only three compartments in the stomach and it lacks a rumen, while the ruminant digestive system has four compartments in the large stomach including the rumen. There are four basic types of digestive systems. They are the monogastric digestive […]

The key difference between monogastric and polygastric digestive system is based on the characteristics of the stomach. That is; the Monogastric digestive system has a single-chambered stomach while the polygastric digestive system has a four-chambered stomach. The digestive system is the main factor that differentiates ruminants from non-ruminants. Ruminants are animals that have a four-chambered […]