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In biology, an organ is a group of tissues which perform some function. Common animal organs include the heart, lungs, brain, eye, stomach, spleen, pancreas, kidneys, liver, intestines, skin, uterus, bladderIn the anatomy of mammals, the urinary bladder is the organ that collects urine excreted by the kidneys prior to disposal by urination. Urine enters the bladder via the ureters and exits via the urethra. Anatomy The urinary bladder is a hollow, muscular a, boneFor other uses of the word "bone", see bone (disambiguation). Gray's illustration of a human femur, a typically recognized bone. Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed,, etc. Common plantGreen algae land plants (embryophytes non-vascular embryophytes Hepatophyta liverworts Anthocerophyta hornworts Bryophyta mosses vascular plants (tracheophytes seedless vascular plants Lycopodiophyta clubmosses Equisetophyta horsetails Pteridophyta "true" organs include the stalkThe word stalk has several basic meanings. Sociology A common usage of the word stalk in sociology is associated to stalking (see article). Natural Sciences In botany and related fields of natural science a stalk may be related to a certain type of edific, stemIn common parlance, a stem is any elongated, usually narrow, extension or supporting structure of an object. Examples are the stem of a smoking pipe, stem of a cut flower, stem of a wine glass, etc. Uses of the term specific to certain fields are as follo, leafThis article is about the leaf a plant organ. See Leaf (disambiguation) for other meanings. In botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the chloroplast con, rootFor other meanings of root, see Root (disambiguation). In vascular plants, roots form the portions of a plant which generally lie below the level of the soil (cf. stem, rhizome). But this is not always characteristic for a root, since a root can also be as, and stamenThe stamen is the male organ of a flower. Typical flowers have six stamens inside a perianth (the petals and sepals together), but in some species there are many more than six present in a flower. Each stamen consists of a thin stalk called a filament sup. A group of related organs is an organ system. Organelles are analogous sub- cellular structures.
1 Organ systems
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