Embryonic Development of Heart: The heart begins as a simple tube and folds into a four-chambered organ through a series of stages, with beating beginning around week 4 of development.
Germ Layers: The three primary germ layersectoderm, mesoderm, and endodermform during gastrulation and give rise to all tissues and organs in the developing embryo.
Capillary Bed: Capillary beds are networks of microscopic vessels where exchange of oxygen, nutrients, and waste occurs between blood and surrounding tissues, regulated by precapillary sphincters that control blood flow.
Major Systematic Veins: Major systemic veins include the superior and inferior vena cava, jugular veins, subclavian veins, and iliac veins, all channeling deoxygenated blood back to the heart.
Major Systemic Artery: The major systemic artery is the aorta, which distributes oxygenated blood from the left ventricle to the entire body via its ascending, arch, and descending sections.
Comparison of Artery and Vein: Arteries have thick, muscular walls to handle high pressure and carry blood away from the heart, while veins have thinner walls, valves, and carry blood back to the heart under lower pressure.
Large Medium Vein Venule: Venous return involves small venules merging into medium and large veins; these vessels have thinner walls than arteries and contain valves to prevent backflow.
Histology of Stomach: Stomach histology includes mucosal layers with gastric pits and glands containing cells that secrete acid, enzymes, and mucus, supported by muscularis layers for churning.
Heart Position in Thorax: The heart is positioned in the mediastinum of the thoracic cavity, slightly left of the midline, with its apex pointing downward and to the left, resting on the diaphragm.
Embryonic Folding: Embryonic folding transforms the flat trilaminar disc into a three-dimensional body, forming the basic body plan and enclosing the gut tube within the embryo.
Structures of the Mouth: The mouth contains the lips, teeth, tongue, salivary glands, hard and soft palate, and the oropharynx, playing roles in digestion, speech, and sensory reception.
Structure and Histology of a Lymph Node: Lymph nodes have a cortex rich in lymphocytes and a medulla containing sinuses and macrophages, acting as filters to trap pathogens and facilitate immune responses.
Divisions of the Pharynx: The pharynx is divided into the nasopharynx (air passage), oropharynx (shared air and food passage), and laryngopharynx (leading to the esophagus and larynx).
Before we have a look at the brain diagram, it is important to go through a few facts about the brain and its function. This will help you understand the anatomy of the brain better. The average dimension of the View Diagram Diagram Of Px Human Brain Development Timeline Image
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Gingivitis is the first stage of gum disease representing the mildest form of periodontal disease. Gingivitis is an inflammation of the gums characterized by redness, swelling, and sometimes bleeding during brushing or probing. 5,270 gum disease stock photos and images View Diagram Stages Of A Gum Disease Image
The human arm is divided into two main sections: the forearm and the arm itself. The forearm is the section located between the elbow and the wrist, while the arm represents the section from the shoulder to the elbow. The View Diagram Arm Bones Diagram Image
