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...n the [[Micrometre|micro]] to the [[Nanometre|nano]]scopic scale, examples of biological systems are [[cell (biology)|cells]], [[organelles]], macromolec ...m]], the [[spinal cord]], and the [[nerve]]s are the four basic components of the [[nervous system]]. ...

[[File:Citric acid cycle with aconitate 2.svg|thumb|upright=2|Overview of the citric acid cycle]] ...]]s to follow only one specific route; at least three alternative segments of the citric acid cycle have been recognized. ...

[[File:Citric acid cycle with aconitate 2.svg|thumb|upright=2|Overview of the citric acid cycle]] ...]]s to follow only one specific route; at least three alternative segments of the citric acid cycle have been recognized. ...

'''Blood''' is a [[body fluid]] in the [[circulatory system]] of [[humans]] and other [[vertebrate]]s that delivers necessary substances suc ...ons and parasites. Platelets are important in the [[Coagulation|clotting]] of blood. ...

'''Blood''' is a [[body fluid]] in the [[circulatory system]] of [[humans]] and other [[vertebrate]]s that delivers necessary substances suc ...ons and parasites. Platelets are important in the [[Coagulation|clotting]] of blood. ...

...s the '''cardiovascular system''', or '''vascular system''', that consists of the heart and blood vessels (from Greek ''kardia'' meaning ''heart'', and f ...osed]] in vertebrates, which means that the blood never leaves the network of blood vessels. Some [[invertebrate]]s such as [[arthropod]]s have an [[open ...

| Caption = Diagram of [[stomach]], intestines and [[rectum]] in the average [[human]] ...the anus as [[Feces|faeces]]. ''Gastrointestinal'' is an adjective meaning of or pertaining to the stomach and intestines. ...

...s the '''cardiovascular system''', or '''vascular system''', that consists of the heart and blood vessels (from Greek ''kardia'' meaning ''heart'', and f ...osed]] in vertebrates, which means that the blood never leaves the network of blood vessels. Some [[invertebrate]]s such as [[arthropod]]s have an [[open ...

| Caption = Diagram of [[stomach]], intestines and [[rectum]] in the average [[human]] ...the anus as [[Feces|faeces]]. ''Gastrointestinal'' is an adjective meaning of or pertaining to the stomach and intestines. ...

{{Short description|Set of chemical reactions in organisms}} [[File:Metabolism.png|thumb|Simplified view of the cellular metabolism]] ...

{{Short description|Varieties of peppers of Capsicum genus}} [[File:Madame Jeanette and other chillies.jpg|thumb|Chili peppers of varied colours and sizes: green [[Bird's eye chili|bird's eye]], yellow [[M ...

{{Short description|Set of chemical reactions in organisms}} [[File:Metabolism.png|thumb|Simplified view of the cellular metabolism]] ...

{{Short description|Varieties of peppers of Capsicum genus}} [[File:Madame Jeanette and other chillies.jpg|thumb|Chili peppers of varied colours and sizes: green [[Bird's eye chili|bird's eye]], yellow [[M ...

{{Short description|Group of fat-soluble secosteroids}} ...oluble]] [[secosteroid]]s responsible for increasing intestinal absorption of [[calcium]], [[magnesium]], and [[phosphate]], and for many other biologica ...

{{Short description|Group of fat-soluble secosteroids}} ...oluble]] [[secosteroid]]s responsible for increasing intestinal absorption of [[calcium]], [[magnesium]], and [[phosphate]], and for many other biologica ...

[[File:Разнообразие семян.jpg|thumb|350px| Seeds of various plants. '''Row 1:''' [[poppy]], [[Bell pepper|red pepper]], [[straw ...ng with a food reserve. The formation of the seed is a part of the process of [[reproduction]] in seed plants, the [[spermatophytes]], including the [[gy ...

...humb|upright=1.5|Flowers or clusters of flowers produced by twelve species of [[Angiosperms]] from different families.]] ...population) resulting from [[cross-pollination]] or allow selfing (fusion of sperm and egg from the same flower) when [[self-pollination]] occurs. ...

{{short description|Kingdom of mainly multicellular, predominantly photosynthetic eukaryotes}} | image = Diversity of plants image version 5.png ...

...image3=Goliath beetle.jpg|image4=Tree Fern.jpg|footer=Biology is the study of life. ...ight | first6 = Ann | date = December 2015 | title = A physiologist's view of homeostasis | journal = Advances in Physiology Education | volume = 39 | is ...

{{About|the naturally occurring protein|uses of insulin in treating diabetes|Insulin (medication)}} ...ave the opposite effect by promoting widespread [[catabolism]], especially of [[obesity|reserve body fat]]. ...