CIRCULATORY SYSTEM Flashcards
The means for chemical exchange between different organs
circulatory system
Blood of insect
haemolymph
Body cavity for blood
hemocoele
main organ of circulation lying at the top of the body cavity extending from the back of the abdomen to the head;
Dorsal vessel
Primary circulatory pump
heart
location of aorta
anterior: thorax and cephalic portion
bands of wingshaped muscles bordering the heart below, connecting the heart to the lateral portions of the TERGA
alary muscles
openings without valves but with spongiform cells
excurrent ostia
the vertical openings which permit blood flow in the heart
incurrent ostia
cells that expand during contraction so that blood can pass out of the vessel
Spongiform cells
actual recording of the contraction and relaxation phases of the heart
heart beat
intrinsic characteristic of heart muscles
they are myogenic
parts of heart beat
diastole 1
diastole 2 - from alary muscles
systole - contraction of heart beat due to contraction of heart mucles
tube that carries blood forward in to the head capsule
lacks muscles
aorta
accessory pulsatile organ in the mesothorax that draw blood throughout the wings
thoracic pulsatile organ
accessory pulsatile organ that guide flow of blood back and to the sides
ventral diaphragm
type of dv without segmental swellings
straight tube
type of dv that have a series of large segmentally arreanged bubous structure
dilatations
type of dv that may have cephalic tubular extensions
tubular extensions
list innervations that supply the heart
-recurrent nerve - ganglia of ventral nerve cord
-stomogastric nerve system - via occipital and ingluvial ganglionic nerves
-esophageal nerves
usual color of insects blood
white, yellow and green
compostion of insects blood
liquid plasma 90
hemocytes 10
prevents freezing of insects blood
ribulose and trehalose/glycerol
properties of haemolymph
ph 6-8
16-20% of the total body weight
specific gravity of 1.012 - 1.03
do not contain hemoglobin
roles of blood in insects
- transport and absorb nutrients from the digestive system
- absorb metabolic waste
- transport hormones
*detoxify, lessen infection, produce distasteful compounds - convert substances
- hydraulic function during molting and growth
- thermoregulation
how does blood circulate
heart - aorta - head - bathes organs - percolates to alimentary canal to abdomen - recycled by the heart
muscles that aid in blood flow to appendages
longitudinal muscles (septa)
aid in circulating blood thru the wing veins
thoracic pulsatile organs
sinus that facilitates circulation in the legs and antennae
perineural sinus
sinus that facilitates circulation in all organs
perivisceral sinus
sinus accessory pulsatile organs that acts as siphon
pericardial sinus
partition between the heart and the body cavity
dorsal diaphragm
covers the nerve cord (periisceral / perineural sinus)
ventral diaphragm
Large cells scattered along the DV and alary muscles serving as major site for metabolism of unwanted CHON from blood
pericardial cells and other nephrocytes
loose meshwork of lobes invested in connective tissue and consists of adiphocytes serving for intermediary metabolism of protein, also CHO and fat metabolism
fat body
Found underneath epidermis and are the large cells that produce constituents of the cuticle (lipoprotein); for intermediary metabolism of CHO, CHON and fat
oenocytes
