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
34,197,885
questions answered
GET
Answers.
GET THE APP.
weegy*
*
Get answers from Weegy and a team of really smart live experts.
Popular Conversations
Earthquakes can only occur at a fault if the fault experiences ...
Weegy: The area in a fault where stress builds up is called the hypocentre zone.
7/27/2021 3:42:44 AM| 5 Answers
The Zero law Means
7/21/2021 2:04:29 AM| 3 Answers
How many cities are in pennsylvania
7/22/2021 5:04:58 PM| 3 Answers
What’s 2 plus 7
Weegy: 2 + 2 is 4. User: That’s 2 + 8 Weegy: Hi, how can help you? User: What’s 2 + 8 Weegy: 2 * 2 = 4 User: ...
7/22/2021 7:30:18 PM| 3 Answers
The Eighteenth Amendment, "Prohibition," was reversed by the
Weegy: The Eighteenth Amendment, "Prohibition," was reversed by the Twenty-first Amendment. User: Controls given ...
7/26/2021 8:15:46 AM| 3 Answers
NIMS is applicable to all stakeholders with incident related ...
Weegy: NIMS is applicable to all stakeholders with incident related responsibilities. TRUE. User: The _________ is ...
7/27/2021 4:06:34 PM| 3 Answers
GET
Answers.
GET THE APP.
weegy*
*
Get answers from Weegy and a team of really smart live experts.
S
L
P
R
P
R
Points 1177 [Total 3861] Ratings 3 Comments 1027 Invitations 12 Offline
S
L
Points 909 [Total 1620] Ratings 2 Comments 889 Invitations 0 Offline
S
L
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
P
1
L
Points 813 [Total 5374] Ratings 28 Comments 533 Invitations 0 Online
S
L
P
P
Points 622 [Total 3565] Ratings 0 Comments 622 Invitations 0 Offline
S
L
Points 473 [Total 474] Ratings 0 Comments 473 Invitations 0 Offline
S
L
P
P
L
P
Points 277 [Total 7205] Ratings 1 Comments 267 Invitations 0 Offline
S
L
L
P
Points 258 [Total 5669] Ratings 1 Comments 248 Invitations 0 Offline
S
L
R
Points 254 [Total 745] Ratings 14 Comments 104 Invitations 1 Offline
S
L
Points 233 [Total 523] Ratings 0 Comments 233 Invitations 0 Offline
S
L
1
1
1
1
1
Points 141 [Total 2082] Ratings 14 Comments 1 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.