class RedBloodCellCount(object):
""" Keep track of all red blood (rb) cells in the system.
Circular linked list.
"""
def __init__(self):
self.rb_cells = CircularList()
def add_red_blood_cell(self, rb_cell):
self.rb_cells.append(rb_cell)
def __init__(self):
self.rb_cells = CircularList()
