Germ Layers
Posted inCell

Germ Layers

During early embryonic development, the blastula reorganizes into three primary germ layers that give rise to all tissues and organs. The outer ectoderm forms skin, hair, nails, and the nervous…
Blood Volume Loss and Homeostasis
Posted inMedical

Blood Volume Loss and Homeostasis

An illustration of blood volume loss and homeostasis explains how the body responds to bleeding or dehydration. It shows sensors detecting reduced volume or pressure, triggering responses such as increased…
Lower Limb Arteries Anterior Posterior
Posted inMedical

Lower Limb Arteries Anterior Posterior

Lower limb arteries arise from the femoral artery continuing the external iliac, viewed anteriorly showing profunda femoris branching deep into thigh muscles, then popliteal behind the knee giving genicular branches,…
Catabolic and Anabolic Pathways
Posted inCell

Catabolic and Anabolic Pathways

A metabolic pathway diagram comparing catabolic and anabolic processes shows how the body balances breakdown and building. Catabolic pathways are illustrated breaking large molecules into smaller units while releasing energy,…
Defribillators
Posted inMedical

Defribillators

Defibrillators are lifesaving devices designed to deliver an electric shock to the heart when it's in a chaotic, ineffective rhythm like ventricular fibrillation or pulseless ventricular tachycardia during cardiac arrest,…
Autosomal Dominant Inheritance
Posted inMedical

Autosomal Dominant Inheritance

A genetic inheritance chart for autosomal dominant traits uses family trees to show transmission across generations. Affected individuals appear in each generation, reinforcing how a single gene copy can express…
Embryonic Folding
Posted inMedical

Embryonic Folding

Embryonic folding converts the flat trilaminar disc into a cylindrical body around weeks 3-4 through head, tail, and lateral folds that pinch the embryo off the yolk sac, incorporating endoderm…
Accessory Organs
Posted inOrgans

Accessory Organs

An anatomy image of accessory organs emphasizes structures that support major systems without forming the main pathway. Common examples include the liver, pancreas, gallbladder, and salivary glands. The layout shows…
CPR Technique
Posted inMedical

CPR Technique

A CPR technique illustration demonstrates correct hand placement, compression depth, and rhythm. Sequential steps show how chest compressions and rescue breaths maintain circulation during cardiac arrest, emphasizing lifesaving timing and…
Permanent and Deciduous TeethN
Posted inDental

Permanent and Deciduous TeethN

Humans have two sets of teeth: deciduous starting eruption around 6 months with 20 total—8 incisors, 4 canines, 8 molars—for primary chewing until about age 12 when exfoliated, and permanent…
Digestion of Proteins Physiology
Posted inMedical

Digestion of Proteins Physiology

Digestion of proteins physiology involves not just enzymes but sophisticated regulation to match secretion to dietary intake, starting with the cephalic phase where sight or smell of food stimulates vagal…
Muscular and Elastic Artery Arteriole
Posted inMedical

Muscular and Elastic Artery Arteriole

Muscular arteries like femoral or radial distribute blood flow via thick tunica media of smooth muscle regulating resistance through vasoconstriction or dilation, elastic arteries like aorta buffer pulsatile flow with…
Hepatic Portal Vein System
Posted inOrgans

Hepatic Portal Vein System

The hepatic portal vein system is a unique venous network that collects nutrient-rich, deoxygenated blood from the gastrointestinal tract, pancreas, and spleen and delivers it directly to the liver for…
Vascular Homeostasis Flow Art
Posted inMedical

Vascular Homeostasis Flow Art

Vascular homeostasis maintains flow via autoregulation myogenic metabolic matching perfusion demand, endothelial nitric oxide prostacyclin vasodilation shear stress, endothelin angiotensin constriction, arteriolar tone dominant resistance site, capillary hydrostatic oncotic pressures…
FlowChart Veins into VenaCava
Posted inMedical

FlowChart Veins into VenaCava

Venous blood from the body converges into two great veins: the superior and inferior vena cava. Head and neck veins drain into the brachiocephalic veins, which merge into the superior…
IVF
Posted inWomen

IVF

In vitro fertilization bypasses natural barriers by retrieving mature eggs from stimulated ovaries, fertilizing with sperm in lab—sometimes via ICSI injection—culturing embryos to blastocyst, then transferring to prepared uterus, with…
Iliac Artery Branches Chart
Posted inMedical

Iliac Artery Branches Chart

The common iliac arteries branch from abdominal aorta bifurcation at L4, each dividing into external iliac supplying lower limb via femoral and internal iliac feeding pelvis. Internal branches include superior…
Histology of the Large IntestineN
Posted inOrgans

Histology of the Large IntestineN

The large intestine's histology is geared toward water absorption, electrolyte balance, and waste formation, with a mucosa lacking villi but featuring deep crypts of Lieberkühn lined by columnar absorptive cells…
Fetal Circulatory System
Posted inMedical

Fetal Circulatory System

The fetal circulatory system is beautifully adapted to bypass the lungs and liver while maximizing placental exchange. Blood leaves the fetus through two umbilical arteries branching from the iliac arteries,…