Rekomenduojama Įdomios Straipsniai

Neprivalomas

Kraujas

Apibrėžimas: Kraujas yra kūno skystis žmonėms ir visiems stuburiniams gyvūnams, kurie organizme intensyviai perduodami, t. Deguonies įsisavinimas ir anglies dioksido išsiskyrimas leidžia. Vieno suaugusiojo bendras kraujo tūris yra nuo 4 iki 6 litrų (moterų tarp 4-5 l, vyrų 5-6 l).
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7.4: Mutacijos ir vėžys - biologija

What would happen if this cycle proceeds at will?Your cells may grow and divide without performing their necessary functions, or without fully replicating their DNA, or without copying their organelles. So the cell cycle needs to be highly regulated and tightly controlled. And it is.Control of the Cell CycleHow does the cell know when to divide?
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Atvejo tyrimas - mažytė širdis - biologija

Kelly was in the maternity ward, her contractions were about 3 minutes apart and the fetal monitor was sounding frequent beeps giving indications of the baby’s heartbeat. It also recorded the intensity and frequency of the contractions.Doctor Tavish entered the room carrying a clipboard. He checked the monitor and nodded, giving Kelly assurances that everything looked alright.
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