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The pericardium (pl.: pericardia), also called pericardial sac, is a double-walled sac containing the heart and the roots of the great vessels. [1] It has two layers, an outer layer made of strong inelastic connective tissue (fibrous pericardium), and an inner layer made of serous membrane (serous pericardium).
The heart is a muscular organ found in humans and other animals.This organ pumps blood through the blood vessels. [1] Heart and blood vessels together make the circulatory system. [2]
The cycle diagram depicts one heartbeat of the continuously repeating cardiac cycle, namely: ventricular diastole followed by ventricular systole, etc.—while coordinating with atrial systole followed by atrial diastole, etc.
The USDA's original food pyramid, from 1992 to 2005 [1]. A food pyramid is a representation of the optimal number of servings to be eaten each day from each of the basic food groups. [2]
Cabbage plants. Cruciferous vegetables are vegetables of the family Brassicaceae (also called Cruciferae) with many genera, species, and cultivars being raised for food production such as cauliflower, cabbage, kale, garden cress, bok choy, broccoli, Brussels sprouts, mustard plant and similar green leaf vegetables.
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Quinoa (Chenopodium quinoa; / ˈ k iː n. w ɑː, k i ˈ n oʊ. ə /, [2] [3] [4] from Quechua kinwa or kinuwa) [5] is a flowering plant in the amaranth family.It is ...
The dodo was variously declared a small ostrich, a rail, an albatross, or a vulture, by early scientists. [3] In 1842, Danish zoologist Johannes Theodor Reinhardt proposed that dodos were ground pigeons, based on studies of a dodo skull he had discovered in the collection of the Natural History Museum of Denmark.