Question

Q.1. How are the alveoli designed to maximise the exchange of gases?

Q. 2. What constitutes one heart beat? Is the pulse rate same as heart beat rate ?

Q. 3. What is the need of four-chambered heart in mammals while fishes have only two-chambered
heart?

Q. 4. Om, Rohit and Kishore always remain in a hurry. One day, during lunch hour they all quickly
gulped food and went out to play.
Om suddenly develops stomach ache while playing. What according to you might have gone wrong with him.​

Answer 1

Answer:

1. ᴛʜᴇ ᴀʟᴠᴇᴏʟɪ ᴀʀᴇ ᴛʜɪɴ-ᴡᴀʟʟᴇᴅ ᴀɴᴅ ʀɪᴄʜʟʏ sᴜᴘᴘʟɪᴇᴅ ᴡɪᴛʜ ᴀ ɴᴇᴛᴡᴏʀᴋ ᴏғ ʙʟᴏᴏᴅ ᴠᴇssᴇʟs ᴛᴏ ғᴀᴄɪʟɪᴛᴀᴛᴇ ᴛʜᴇ ᴇxᴄʜᴀɴɢᴇ ᴏғ ɢᴀsᴇs ʙᴇᴛᴡᴇᴇɴ ʙʟᴏᴏᴅ ᴀɴᴅ ᴛʜᴇ ᴀɪʀ-ғɪʟʟᴇᴅ ɪɴ ᴀʟᴠᴇᴏʟɪ. ... ᴛʜᴇʏ ʜᴀᴠᴇ ᴀ ʙᴀʟʟᴏᴏɴ-ʟɪᴋᴇ sᴛʀᴜᴄᴛᴜʀᴇ ᴛʜᴀᴛ ᴘʀᴏᴠɪᴅᴇs ᴍᴀxɪᴍᴜᴍ sᴜʀғᴀᴄᴇ ᴀʀᴇᴀ ғᴏʀ ᴇxᴄʜᴀɴɢᴇ ᴏғ ɢᴀsᴇs.

2.

Answer 2

Answer:

1. the alveoli is designed as grape shape means it looks like a grape

2.