Kingdom Animalia Flashcards
What are the five characteristics common to most animals?
Multicellular
Heterotrohpic
Specialized cells for specialized functions
They are capable of locomotion at some point
Reproduce sexually
What is symmetry in terms of animals?
The arrangement of body structures relative to the body axis
What does the term asymmetrical mean?
It means that no “cuts” can be made through the organism and make equal halves
What does the term radial symmetrical mean?
Radial symmetry has many planes
What does the term bilateral symmetry mean?
Bilateral symmetry means that only one plane can be made to give roughly equivalent halves
What are the three tissue layers?
Ectoderm
Endoderm
Mesoderm
In early development of all animals, except sponges, cells form layers called ________________
GERM LAYERS
What is the “ectoderm”?
The outer covering of body and nervous tissue
What is the “endoderm” ?
The inner layer that forms lining of digestive tube and structures.
What is the “mesoderm”?
It gives rise to skeletal, muscle, cardiovascular, and others
What are the three types of body cavities?
`Acoelomate
Pseudocoelomate
True coelomate
Describe the acoelomate body cavity type?
Aceolomates have no body cavity
Describe pseudocoelomate body cavity
The body cavity is not completely lined with mesoderm
Describe true coelomates
True coelomates have a body cavity completely lined with a mesoderm
Sponges are associated with what phylum?
Phylum Porifera
What does the term sessile mean?
Unable to move
In terms of sponges, what does “benthic” mean?
It means to “live at the bottom”
What are sponges supported by?
Spicules and spongin
What is “spongoceol”?
The central cavity of a sponge
What is the “osculum” in terms of sponges?
It is the open end of the sponge
What are “choamocytes” ?
The “collar cells” that create water current to bring in food and oxygen in sponges
What are amoeboid cells?
Cells that phagocytize food in sponges
How do sponges asexually reproduce?
Through budding by gemmules and fragmentation
How do sponges sexually reproduce?
By producing eggs and sperm
What are the three types of sponge body types?
Ascon
Sycon
Leucon
Describe the ascon sponge body type
Tube shaped
Describe the sycon sponge body type
Folded body wall
Describe the leucon sponge body type
highly folded body wall with no spongocoel
Cnidarians are mostly ____________________
MARINE
Cnidarieans have ______________ definite tissue layers
TWO
What is the gastrodermis in terms of cnidarians?
The gastrodermis lines the gastro vascular cavity and functions in digestion
What si the mesoglea in terms of cnidarians?
It separates the above two layers
What is the function of the gastrovascular cavity in cnidarians?
It serves as intake of food and expulsion of wastes
What are the two body forms of cnidarians?
The polyp
The medusa
Describe the upper mouth of the polyp
The upper mouth is surrounded by tentacles
What are hermaphrodites?
Organisms that produce eggs and sperm
Describe the body of a polyp
The polyp has a stalked tube like body
Describe the mouth of a medusa
It’s lower mouth i8s surrounded by tentacles
The medusa is “__________”
Umbrella like
What is the manubrium?
It is the stalk that extends from the mouth of medsa