Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence beginning with the first word that is underlined.
ARTERY, Capillaries, Venule, Vein, Arteriole.
Topic: Path of blood through vessels
Answer
Artery → Arteriole → Capillaries → Venule → Vein
This traces blood from the heart, through the tissues, and back: ARTERY — a large vessel carrying blood away from the heart ARTERIOLE — its smaller branch CAPILLARIES — the microscopic vessels where exchange with the tissues occurs VENULE — small vessels collecting blood from the capillaries VEIN — the larger vessel returning it to the heart
THE SHAPE OF THE SEQUENCE is worth noticing: the vessels get SMALLER and SMALLER until the capillaries, then LARGER and LARGER again. The suffix -OLE and -ULE both mean "little", which tells you the arteriole and venule sit next to the capillaries.
The capillaries are the point of the whole system. Everything before them delivers and everything after them collects; exchange happens only there, because only their walls are one cell thick.