Animals
The organ level of organisation in animals can be first detected in flatworms and the more advanced phyla. The less-advanced taxons (like Placozoa, Porifera and Radiata) do not show consolidation of their tissues into organs.
Read more about this topic: Organ (anatomy)
Famous quotes containing the word animals:
“Chinese civilisation is so systematic that wild animals have been abolished on principle.”
—Aleister Crowley (1875–1947)
“Man’s unique reward, however, is that while animals survive by adjusting themselves to their background, man survives by adjusting his background to himself.”
—Ayn Rand (1905–1982)
“Lost at night in an immense forest, I only have a small light to guide me. A man appears who tells me: “My friend, blow out your candle in order to find your way.” This man is a theologian.
The sea, fluid garden filled with animals and plants.”
—Alfred Döblin (1878–1957)