Transport in Animals - Intro and Types of System Flashcards
what are the features of an effective transport system
- a fluid to carry oxygen and glucose/amino acids/fatty acids and glycerol around the body
- exchange surfaces that enable oxygen and glucose/amino acids/fatty acids to enter and leave the blood
- a pump to create pressure that will push the fluid around the body
what will an efficient transport system also include
- tubes/vessels to carry the blood
- two circuits
what has closed circulatory systems
vertebrates
what is a closed circulatory system
blood stays entirely inside vessels
a separate fluid bathes the cells (tissue fluid)
what has an open circulatory system
insects
what is an open circulatory system
blood is not always contained within vessels but circulates the body cavity (haemocoel)
cells are bathed directly in blood
how does an insect’s circulatory system work
they still have “hearts” to pump blood around the body
they squeeze blood towards the head where it flows out into the haemocoel
define a single circulatory system
blood only flows through the heart once for each complete circuit of the body
define a double circulatory system
blood flows through the heart twice for each complete circuit of the body
what are the two systems in a double circulatory system
pulmonary (heart to lungs)
- systemic (heart to body)
do fish have a double or single circulatory system
single
what are the advantages of a double circulatory system
blood passes through the heart after it has passed to the lungs, so pressure of the blood can be increased, supplying oxygen and glucose more quickly to body tissues
which system has lower pressure and why
pulmonary as it prevents damage to delicate capillaries in lungs
