We conducted an experiment to determine if type of blood is a main effect or interact with a treatment (2 treatments). The subjects were measured on several hours (5 times). There are 3 subjects by type of blood (these are replicates). Then, we have the effects of TYPE, TREATMENT, TIME.
We are not sure if Time is a covariate, we think Time as a factor because we don't look for a specific behavior on Time, only at 5 Times, to have a replication in Time (then Time can be random factor). However, TYPE and TREATMENT are fixed factors.
This is a repeated measures design or mixed model, or simply ANOVA with 2 fixed and one random factor (within ¿?).