Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

life processes.
Asked by kanishkaaggarwal | 04 Dec, 2009, 09:44: PM
answered-by-expert Expert Answer

In single-celled organisms the entire surface of the organisms is in contact with the environments for the diffusion of substances. In multi-cellular organisms, the body size is large and all the cells are not in direct contact with the surrounding environment. Through diffusion, oxygen will not reach the cells lying deep within the body.So simple diffusion will not meet the oxygen requirements of all the cells.

Since diffusion pressure alone cannot take care of oxygen delivery to all parts of the body, respiratory pigments are usually present to carry oxygen from lungs to the tissues.

Answered by | 07 Dec, 2009, 06:18: AM
CBSE 10 - Biology
Asked by nsubhashree54 | 24 Feb, 2024, 11:08: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by pavanimullu123 | 26 Dec, 2023, 07:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by jitendranathsingh331 | 26 Nov, 2023, 06:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by waccstudies123 | 08 Oct, 2023, 02:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by 09.10bjanvhijadhav | 16 Sep, 2023, 11:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by devy64469 | 03 Sep, 2023, 09:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Biology
Asked by krishnaagrawal79 | 19 Jul, 2023, 05:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×