Open or close
2006-10-10 12:41:55 · 6 answers · asked by Aurora C 1 in Science & Mathematics ➔ Biology
qoute:
Vertebrates, and a few invertebrates, have a closed circulatory system. The cardiovascular system includes a heart, which is a muscular pump that contracts to propel blood out to the body through arteries, and a series of blood vessels.
end qoute
2006-10-10 12:53:14 · answer #1 · answered by low_on_ram 6 · 0⤊ 0⤋
Vertebrates have closed circulatory system.
2006-10-12 20:04:17 · answer #2 · answered by moosa 5 · 0⤊ 0⤋
closed
2006-10-10 20:50:13 · answer #3 · answered by echinate 3 · 0⤊ 0⤋
It's closed, and it's IN THE CHAPTER!!
2006-10-10 19:46:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
My guess would be closed, or it would all leak out. Yuk.
2006-10-10 19:44:07 · answer #5 · answered by Anonymous · 0⤊ 0⤋
OPEN!
heheh, i jus put that cuz everyone else put closed.
I feel special now =]]
â¥Wat if my answer was right? [hahahaha]â¥
2006-10-11 00:02:18 · answer #6 · answered by jaz 5 · 0⤊ 1⤋