Question and answer
Does a spider have lungs?
Question
Asked 3/9/2012 10:19:42 PM
0 Answers/Comments
This answer has been confirmed as correct and helpful.
s
Get an answer
Original conversation
User: Does a spider have lungs?

Weegy: Spiders have an open circulatory system; i.e., they do not have true blood, or veins to convey it. Rather, their bodies are filled with haemolymph, which is pumped through arteries by a heart into spaces called sinuses surrounding their internal [ organs. Spiders have developed several different respiratory anatomies, based either on book lungs, a tracheal system, or both. Mygalomorph and Mesothelae spiders have two pairs of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allow air to enter and diffuse oxygen. This is also the case for some basal araneomorph spiders like the family Hypochilidae, but the remaining members of this group have just the anterior pair of book lungs intact while the posterior pair of breathing organs are partly or fully modified into tracheae, through which oxygen is diffused into the haemolymph or directly to the tissue and organs. This system has most likely evolved in small ancestors to help resist desiccation. The trachea were originally connected to the surroundings through a pair of spiracles, but in the majority of spiders this pair of spiracles has fused into a single one in the middle, and migrated posterior close to the spinnerets. taken from ]


User: Cnidarians were one of the first groups of animals to develop _____. body cavities endoskeletons jointed appendages specialized tissues

Weegy: A. Body cavities
ahart33|Points 621|

User: The endocrine and exocrine glands secrete _____ in vertebrates. digestive juices hormones saliva excretory waste





Weegy: The endocrine and exocrine glands secrete hormones in vertebrates.
Expert answered|debnjerry|Points 27946|



Question
Asked 3/9/2012 10:19:42 PM
0 Answers/Comments
This answer has been confirmed as correct and helpful.
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
In nerve cells, the is responsible for transmitting impulses away from the cell body.
Weegy: In nerve cells, the axon is responsible for transmitting impulses away from the cell body. (More)
Question
Updated 3/26/2016 1:42:58 PM
0 Answers/Comments
31,913,546
questions answered
GET
Answers.
GET THE APP.
weegy*
*
Get answers from Weegy and a team of really smart live experts.
Popular Conversations
How did people bring religion west with them
Weegy: Churches were the first things built in towns.
7/13/2020 6:47:58 PM| 4 Answers
Before the slave trade what was African culture like
Weegy: Before the slave trade, African culture was agricultural and advanced. User: What happened to the settlement ...
7/7/2020 2:40:15 PM| 4 Answers
Which NIMS Management Characteristic helps to eliminate confusion ...
Weegy: The National Incident Management System (NIMS) is a standardized approach to incident management developed by ...
7/5/2020 7:40:46 PM| 2 Answers
S
L
R
R
R
L
Points 1664 [Total 5001] Ratings 3 Comments 1364 Invitations 27 Offline
S
L
Points 1067 [Total 1816] Ratings 7 Comments 997 Invitations 0 Online
S
L
P
L
Points 909 [Total 5067] Ratings 0 Comments 909 Invitations 0 Offline
S
L
Points 772 [Total 1328] Ratings 1 Comments 762 Invitations 0 Offline
S
L
Points 491 [Total 980] Ratings 1 Comments 481 Invitations 0 Offline
S
L
P
R
P
R
L
P
P
C
R
P
R
L
P
R
Points 430 [Total 11497] Ratings 4 Comments 380 Invitations 1 Online
S
L
Points 415 [Total 2386] Ratings 0 Comments 415 Invitations 0 Online
S
L
1
Points 371 [Total 3019] Ratings 0 Comments 371 Invitations 0 Offline
S
L
R
Points 294 [Total 2426] Ratings 2 Comments 274 Invitations 0 Offline
S
L
P
R
P
R
L
Points 290 [Total 5032] Ratings 1 Comments 280 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.